Ed_Wischmeyer
Well Known Member
So a buddy and I were out fooling around today, trying to excite the phugoid.
We excited the short term response three times, but were fooled because it was oscillatory and lightly damped, maybe five cycles to dampen out. Data after the fact showed a period of about 22 seconds. Only got the phugoid going once, period about 60 seconds. And even though the phugoid is supposed to be constant AOA, the AOA was oscillating with the same period as everything else.
Anybody else got any numbers?
And the light damping may be part of why the -9A is not all that friendly to hand fly IFR.
Ed
We excited the short term response three times, but were fooled because it was oscillatory and lightly damped, maybe five cycles to dampen out. Data after the fact showed a period of about 22 seconds. Only got the phugoid going once, period about 60 seconds. And even though the phugoid is supposed to be constant AOA, the AOA was oscillating with the same period as everything else.
Anybody else got any numbers?
And the light damping may be part of why the -9A is not all that friendly to hand fly IFR.
Ed